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DIN f4 di flange resilient epdm gate valve DN450-1200 Resilient Seated Gate Valve DIN F5 Non-rising stem Resilient gate valve DIN F5 Socket connection soft seal gate valve Underground cap soft seal gate valve BS5163 Rising stem Resilient soft seal gate valve Brass Threaded Gate Valve Hard seal gate valve API Slab Gate Valve Stainless Steel Gate Valve Stainless Steel Knife Gate Valve Pneumatic gate valve Control valve Soft Seal Gate Valve Extension stem gate valve Non rising stem Groove Soft Sealing Gate Valve Rising stem Forged steel gate valve API carbon steel gate valve Threaded Gate Valve Din rising Stem And Non-Rising Stem Gate Valve UL-FM Rising stem flanged fire fighting system gate valve ANSI Cast Iron Gate Valve British Standard Soft-Sealing Gate Valve

Butterfly valve

DN2000 Double Eccentric Butterfly Valve Flange butterfly valve Lug butterfly valve Wafer Butterfly Valve With Handle Worm Gear Operated Wafer Butterfly Valve Wafer lined fluorine butterfly valve stainless steel wafer butterfly valve Stainless Steel Flanged Butterfly Valve Eccentric soft sealing flange butterfly valve Electric three-eccentric metal hard seal butterfly valve Pneumatic Flanged Butterfly Valve Pneumatic Wafer Butterfly Valve Three eccentric metal seals wafer butterfly valve ULC butterfly valve report Inflatable Butterfly Valve High Performance Butterfly Valve Grooved butterfly valves Electric soft sealing wafer butterfly valve Double flange fluorine lined butterfly valve Handle Aluminum Butterfly Valve Worm Gear Aluminum Butterfly Valve Full PTFE lined wafer butterfly valve One stem no-pin wafer butterfly valve Multi standard Aluminum handle wafer butterfly valve Multi standard soft seat aluminum lever coated discwafer type butterfly valve Resilient Seated Butterfly Valve Multi standard soft seat wafer type butterfly valve Wafer PTFE seat butterfly valve Worm Gear Operated Lug Butterfly Valve Stainless Steel wafer Butterfly Valve Pneumatic Wafer Butterfly Valve Wafer Type Metal Seat Butterfly Valve Lug type manual wafer butterfly valve without pin Aluminium Handle Lug Butterfly Valve Worm Gear Operated Flange Butterfly Valve Lever Operated Flange Butterfly Valve Butterfly valve stem Butterfly valve disc Butterfly valve seat

High platform flange ball valve Cast Iron Ball Valve SS Thread Ball Valves Three Piece Type Ball Valve API Ball Valve Stainless Steel 3PC Ball Valve PTFE Seat Flanged Ball Valve Forge Steel Fully Welded Ball Valve Metal Seat Ball Valves fixed ball valve Flange connection ball valve 3PC Type Ball Valve With Internal Thread Q11F/H-1000WOG Three Way Ball Valve ANSI API Cast Steel And Stainless Steel Flange Ball valve Two-PCS Type Thread Ball Valve

Globe Valve

API Carbon Steel Globe Valve Bellows Globe Valve Stainless steel flange globe valve Stainless steel thread S type globe valve Stainless steel thread B type globe valve Cast Steel Globe Valve Piston Globe Valve WCB Carbon Steel Globe Check Valve electric motorized control stainless steel SS316 globe valve Brass Globe Valve Cryogenic Globe valve HT200 Globe Valve Threaded Stainless Steel Globe Valve GG25 Globe Valve ANSI API Cast Steel And Stainless Steel Globe valve

Check valve

DN800 Slow Closing Check Valve DN800 Rubber Disc Check Valve Butterfly Buffering Check Valve check valve with counter weight Silent Check Valve Stainless Steel flange Check Valve Swing Check Valve Single Chip Check Valve H74W Stainless Steel Wafer Check Valve Swing Start Check Valve Foot check valve API Swing Check Valve WCB Swing Check Valve Check Valve Lifting Check Valve Bottom Valve Hammer Diminish Noises Check Valve Wafer Check Valve Ductile Iron Check Valve

Control valve

DN1000 Piston Flow Regulating Valve Cage Sleeve Control Valve Pneumatic Flanged Butterfly Valve Pneumatic Wafer Butterfly Valve Pneumatic Angle Seat Valve Control valve Pneumatic gate valve Control valve Electric three-way control valve Electric sleeve control valve

Water Meter

Vertical Type Water Meters Stainless steel threaded water meter Piston water meter Plastic water meter More flow rotor dry water meter spiral vane flange water meter CI wotlman water meter with pulse output LXCLG(R) Vertical removable element woltman cold (hot) water meter Single flow rotor dry water meter Prepaid Token Water Meter Electromagnetic flowmeter Rotary Piston Liquid Sealed Water Meter Rotary Piston Liquid Sealed Water Meter

Double ball exhaust valve Doubleair Air Valve Saudi Doubleair Air Valve Southeast Asia Doubleair Air Valve South America Double Air Valve Threaded Air Valve Single Air Valve Triple Functions Air Valve Automatic Air Release Valve Automatic release valve Automatic exhaust valve Composite Exhaust Air Valve Brass exhaust valve Double Ball Air Valve

Copper valve

4" copper gate valve copper electric solenoid valve brass ball valve Brass exhaust valve Brass Globe Valve Copper Globe Valve Copper Thread Gate Valve Copper Ball Valve （Thread）Copper Strainer

Pipe Repair & Coupling

Flexible Multi-Function Pipe Coupling ZFJ-S SS Semi-Circle Pipe Repair Clamp SJW-H Ductile Iron Band Repair Clamp Stainless Steel Band Repair Clamp Double-Section Pipe Repair Coupling Folding Type Pipe Repair Single-Section Multi-Function Pipe Coupling MF-S Gear-Ring Type Multi-Function Pipe Coupling GR-S ZBW Damping Corrugated Hose

Ductile iron(DI) pipe fittings

Double flanged reducer Blank flange Angle branch tee All flange tee Flange cross Double flange bend Flange elbow 45° 90°Double socket taper /reducer Cast Iron Strainer

Forged Steel Y Strainer DIN standard Industrial Y Type Strainer for Pump Copper Strainer BS Y Strainer Flange Y-Type Strainer Cast Iron Strainer Threaded Strainer German Standard Y Type Filter ANSI “Y” Strainer

Dismantling Joint

VSSJAFC(CC2F) Detachable Flange Transmission Joint VSSJA-2(B2F) Double Flange Limited Expansion Joint VSSJA-1(BF) Single Flange Limited Expansion Joint VSSJA(AF) Flange Loose Expansion Joint JGD-B Threaded Rubber Joint ZBW Damping Corrugated Hose KXT-S Flexible Dual-Spherical Rubber Joint KXT Rubber Soft Joint Flange Adaptor

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WHAT IS A GATE VALVE?

2017-10-14

GATE VALVES ARE WIDELY USED FOR ALL TYPES OF APPLICATIONS AND ARE SUITABLE FOR BOTH ABOVE GROUND AND UNDERGROUND INSTALLATION. NOT LEAST FOR UNDERGROUND INSTALLATIONS IT IS PARAMOUNT TO CHOOSE THE RIGHT TYPE OF VALVE TO AVOID HIGH REPLACEMENT COSTS.

Gate valves are designed for fully open or fully closed service. They are installed in pipelines as isolating valves, and should not be used as control or regulating valves. Operation of a gate valve is performed doing an either clockwise to close (CTC) or clockwise to open (CTO) rotating motion of the stem. When operating the valve stem, the gate moves up- or downwards on the threaded part of the stem.

Gate valves are often used when minimum pressure loss and a free bore is needed. When fully open, a typical gate valve has no obstruction in the flow path resulting in a very low pressure loss, and this design makes it possible to use a pipe-cleaning pig. A gate valve is a multiturn valve meaning that the operation of the valve is done by means of a threaded stem. As the valve has to turn multiple times to go from open to closed position, the slow operation also prevents water hammer effects.

Gate valves can be used for a vast number of fluids. AVK's gate valves are suitable under the following working conditions:
Potable water, wastewater and neutral liquids: temperature between -20 and +70 °C, maximum 5 m/s flow velocity and up to 16 bar differential pressure.
Gas: temperature between -20 and +60 °C, maximum 20 m/s flow velocity and up to 16 bar differential pressure.

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